260 
FOXWORTHY. 
KEY TO PHILIPPINE SPECIES OF IIOPEA. 
a. Secondary nerves few and prominent, 
b. Leaves narrowly oblong. 
c. Leaves bilaterally symmetrical or nearly so, 2-3 cm wide.. 5. E. sp. (Naric) 
cc. Leaves unilaterally unsymmetrieal. 
d. Leaves 10 to 15 cm long, 2.2 to 7 cm wide; fruit less than 8 cm long, 
e. Stipules long, semipersistent ; fruit 6.5 to 7.5 cm long. 
3. H. philippinensis 
ee. Stipules short, fruit 3.5 to 4.3 cm long 1 . H. basilanica 
dd. Leaves larger, fruit 8 cm or more in length 2. E. mindanensis 
bb. Leaves not narrowly oblong. 
c. Leaves broad, elliptic-oval 7. E. ovalifolia 
cc. Leaves lanceolate. 
d. Leaves 3 to 6 cm long, with few (5 to 7) pairs of secondary nerves. 
6. E. sp. (Gyam) 
dd. Leaves larger. 
e. Leaves long-acuminate, usually without domatia 8, E. acuminata 
ee. Leaves not long-acuminate, domatia prominent 4. E. plagata 
aa. Secondary nerves not distant; leaves coriaceous, glabrous, with numerous in- 
■ distinct and almost parallel nerves. 
b. Fruit more than 1 cm long 11. E. sp. 
bb. Fruit less than 1 cm long. 
c. Fruit reddish-brown, leaves with domatia 9. E. pierrei 
cc. Fruit greenish, leaves without domatia 10. E. sp. 
Sect. I. Euhopea. Secondary nerves conspicuous, not approximate, 
not more than 20 pairs. Stamens 15, sometimes 12 to 15. Stylopodium 
always large. 
It seems that most of our species belong in this section. Two undeter- 
mined species are placed, here at a venture, it seeming more probable that 
they will go here than in the section Petalandra. 
1. Hopea basilanica sp. nov. Plate XLII. 
Arbor magna ; f oliis chartaceis, anguste oblongis vel ellipticis, glabris, 
supra nitidis, 10 ad 15 cm longis, 2,2 ad 4.8 cm latis, brevissime caudato- 
acuminatis, basi paullo obliquis, obtusis, utrinque glaberrimis, costa media 
utrinque nervis lateralibus subtus prominentibus ; petiolo brevissimo; 
paniculis brevibus terminalibus vel lateralibus; floribus ; 
fructu majusculo, calyce aecreto cincto; calycis f ructif eri . lobi aucti 3.5 
ad 4.3 cm longi, latitudine fere 10 ad 15 mm. 
Large tree 18 m tall, with thick, black, furrowed bark, like that of 
H. acuminata. Leaves chartaceous, narrowly oblong or elliptic, glabrous, 
shining above, 10 to 15 cm long, 2.2 to 4.8 cm wide. Apex acuminate, 
tapering and unsymmetrieal at base, the part above the midrib being the 
larger. Petiole dark-colored and wrinkled, when dry. Midrib slightly 
pubescent above; secondary nerves 10 to 12 pairs, ascending and bent up- 
ward at the margin of the leaf. Domatia in the axils of at least the lowest 
pairs of veins. Tertiary veins parallel and reticulate. Inflorescence 
